Airtac GAFC Air Service Unit GAFC500C20ALK
The AirTAC Airtac GAFC Air Service Unit GAFC500C20ALK is a genuine two-piece F.R.L. combination — a GA-series filter & regulator and a lubricator pre-assembled on one T-shape bracket with quick mounting clamps. It has 3/4" ports, a 40 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi).
- TypeF.R.L. combination
- Port size3/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight1910 g
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac GAFC Air Service Unit GAFC500C20ALK
This AirTAC GAFC500C20ALK is a two-piece F.R.L. combination built for a 3/4in line. The first body houses the filter and regulator together, so air is cleaned and set to pressure before it moves on; the second body is the lubricator, which adds a controlled oil mist last. The metal bowl and automatic drain suit a fixed installation where condensate must clear itself without an operator.
The lower-pressure regulator is set for 0.15-0.4 MPa (20-58 psi), with a 40 um element and a circular gauge reading MPa/psi. The 108 cc condensate bowl and 225 cc oil bowl give this 1910 g unit a long service interval, and the reverse-flow valve is fitted. With a max supply of 1.0 MPa (145 psi), there is about 0.6 MPa of headroom above the top of the regulated band.
Airtac GAFC Air Service Unit GAFC500C20ALK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500C20ALK |
|---|---|
| Series | GAFC500 F.R.L. combination |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Metal |
| Drain type | Automatic drain |
| Fluid | Air |
|---|---|
| Max. pressure | 1.0 MPa (145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Capacity of drain bowl | 108 cc |
| Capacity of oil bowl | 225 cc |
| Recommended lubricant | ISO VG 32 or equivalent |
| Weight | 1910 g |
Specifications follow the official AirTAC GAFC catalogue (pages 219-220). Air must not freeze in the unit. The fitted circular gauge reads in MPa / psi, set by the PT thread code.
Model Code: Airtac GAFC Air Service Unit GAFC500C20ALK
| GAFC500 | GA500 series F.R.L. unit — sets ports, bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 20 | Port size 3/4". This body offers 20 = 3/4". |
| A | Drain: Automatic drain. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Circular pressure gauge fitted. |
| (blank) | Filtering grade 40 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached. |
Constituent units, orderable separately as spares: GAFR500-20 filter & regulator, GAL500-20 lubricator — both share this body and port. A GAFC has two units, not three: the filter and the regulator are one body.
Size Class & Flow Envelope
- GAFC2001/8"-1/4" · 1750 L/min
- GAFC3001/4"-1/2" · 3500 L/min
- GAFC4003/8"-1/2" · 6000 L/min
- GAFC5003/4" · 7000 L/min
- GAFC6003/4"-1" · 12000 L/min
Figures are the end of the flow curve plotted in the AirTAC catalogue at 0.7 MPa inlet pressure — a sizing envelope for comparing bodies, not a rated flow. Read the catalogue curve for a real duty point. Outlet pressure falls as flow rises, so size a body with headroom above your peak demand.
| This model | GAFC500 · 3/4" · curve to 7000 L/min |
|---|---|
| One size down | GAFC400 |
| One size up | GAFC600 (curve to 12000 L/min) |
| Build order | Filter & regulator → bracket → lubricator |
Where the Airtac GAFC Air Service Unit GAFC500C20ALK Is Used
Machine tool lubrication
Feed a 3/4in header supplying a multi-spindle drilling machine, where the lower pressure protects fine feed units and the automatic drain clears wet shop air.
Assembly line transfer
Run a pallet transfer conveyor with air cylinders that need consistent 0.3 MPa actuation, while the 225 cc oil bowl keeps lubricant available for a full shift.
Test bench air supply
Provide filtered, regulated air to a valve test rig where the 0.15-0.4 MPa band matches the test procedure and the metal bowl handles a warm environment.
Is the Airtac GAFC Air Service Unit GAFC500C20ALK the Right Air-Prep Unit?
Choose the GAFC500 for a 3/4in main line where the lower-pressure range is acceptable. The metal bowl is specified by the C code, and the automatic drain by the A code; the K code adds the reverse-flow valve. The 40 um element is standard, and the PT thread carries a gauge scaled in MPa/psi. If the machine may ever need more than 0.4 MPa, step to a standard-type unit instead. The filter-regulator and lubricator are orderable separately as GAFR500-20 and GAL500-20. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range.
Quick checklist
- ✓ Body size for your peak flow (3/4" here)
- ✓ Standard 0.9 MPa or lower-pressure 0.4 MPa
- ✓ Bowl material: PC (blank), Metal (C), Nylon (N)
- ✓ Drain: semi-auto + manual, or automatic
- ✓ Element 40 µm or 5 µm
- ✓ Thread & gauge scale (PT / G / NPT)
Installation & Maintenance Notes
- check Install with the airflow arrow: filter-regulator first, lubricator last.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Fill the oil bowl with ISO VG 32 or equivalent only.
- check Drain condensate before the 108 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 1910 g unit on its bracket, not on the tubing.
The lubricator adds an oil mist downstream of the regulator. If any part of the line must stay oil-free, use a plain GAFR500-20 filter-regulator on that branch instead of the full combination.
Airtac GAFC Air Service Unit GAFC500C20ALK FAQ
The working pressure range is 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C. The condensate bowl holds 108 cc and the oil bowl 225 cc. Recommended lubricant is ISO VG 32, and the unit weighs 1910 g.
The K code specifies a reverse-flow (reflux) valve fitted to the unit. It is shown as a separate pneumatic symbol in the catalogue. The unit also has a metal bowl and an automatic drain, so it is ready for continuous operation without manual bowl draining.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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